Restrict repository visibilty (fisheye)

When someone creates a crucible review, they choose the repositories. Now since in our instance we have hundreds of repositories indexed, it becomes quite difficult identifying the right repository

So, my question is - is there a way we can restrict the visibility of repositories to users, as a user i am only interested in the 3-5 repositories i am working on , and i should be presented with only 3-5 repostories to choose from not the entire list of 100.